Malicious PDF — malware analysis report

Static analysis result for SHA-256 397f277b00db1001…

MALICIOUS

PDF

40.2 KB Created: 2020-09-03 10:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fb66c91e18cc960ef18b70a50a57432 SHA-1: 77b96dbab7a0dd561fdad397ad67666113cf30ac SHA-256: 397f277b00db10018f108bb573a669e6dbeaaffb90d940f20664c76072a24012
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.me/wix?keyword=granny+smith+apple+nutritional+information'. This URL is presented within the document body, disguised as nutritional information, to trick the user into clicking it. The file also exhibits characteristics of a link farm, with numerous embedded URLs, many pointing to static.usrfiles.com. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.me/wix?keyword=granny+smith+apple+nutritional+information
    • https://static.usrfiles.com/ugd/61b8bf_bff318dc8bde4039922c25a209fd2134.pdf
    • https://static.usrfiles.com/ugd/173616_48f4f08f27d94bff88eab76d95496dfd.pdf
    • https://static.usrfiles.com/ugd/09273f_0fa78d102c704368b21bd1264e1a98e3.pdf
    • https://static.usrfiles.com/ugd/cf79db_c30ae52f4d3f445f97001e921691c86d.pdf
    • https://static.usrfiles.com/ugd/3ceeb9_a381a8fbed1e479ebc6dcd61b1fb1a06.pdf
    • https://static.usrfiles.com/ugd/fac845_5e2fc19915504ee5b316a7751a0340c8.pdf
    • https://static.usrfiles.com/ugd/26938b_59e89f2ac4de42a3abd33aee0d5fadad.pdf
    • https://cdn.shopify.com/s/files/1/0437/7100/3037/files/minecraft_cracked_1._12_2.pdf
    • https://cdn.shopify.com/s/files/1/0437/2260/4693/files/76758797342.pdf
    • https://cdn.shopify.com/s/files/1/0429/3555/0118/files/70926059322.pdf
    • https://static.usrfiles.com/ugd/0251f0_9fafc284e695459e9a88226a24f0a989.pdf
    • https://static.usrfiles.com/ugd/429b25_5a7b415503f34da8856a6299fbe84cc4.pdf
    • https://static.usrfiles.com/ugd/41f880_0f2cd04a9c2e41efa4145e7f761eec7c.pdf
    • https://static.usrfiles.com/ugd/3c8574_977059d5061148c1b3ed230b9832785e.pdf
    • https://static.usrfiles.com/ugd/2e4eb4_b4acb2e5902f4bacb7852e7e2e60bf46.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ff0.bin
a3f52912fa2dc1e281600e181884385e235b1f14ab68103efa31bac67eaea74e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF0 5272 bytes
font_01_sfnt_off000071c0.bin
01d145815b790d9030b8bc6c3f8506f2855b30180dffd0f28210d437b4fa9a0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71C0 9932 bytes

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